Views Bulk Operations Barcode Select allows you to selects items in a VBO display with a barcode scanner. The module adds a barcode field to VBO displays and selects matching records.
UUID Resolver is a module that accepts a UUID under a registered wildcard menu path and redirects to the target object (i.e. node/term/etc.) the UUID identifies. It integrates with the UUID module to look up an object. When a page access hits the wildcard path with a UUID recognized in the system, the URL is redirected to the path of the target object.
For example, in a Drupal site http://www.example.com, node UUID lookup is registered on the path uuid/%. The site has a node:
Facebook Authentication provides a light-weight integration with Facebook's Single Sign-on API. It does not register Facebook users as Drupal users and it uses Javascript SDK, so there's no external library to download.
If you need to register Facebook-authenticated users as Drupal users, please take a look at: Drupal for Facebook module by Dave Cohen.
The principal difference between how this module approaches Facebook Single Sign-on integration and Drupal for Facebook one does is that DFF assumes you want to use Facebook as yet-another authentication and authorization mechanism (in addition to DB and OpenID), whereas this module assumes you do not want to authorize Facebook-authenticated users to anything in Drupal, you just want to grab the user's Facebook authentication data to use it for display (e.g. in comments and such things).
This module also exposes Facebook user data to Drupal's theming layer and third-party modules so you can use it wherever and however you need. Facebook Authentication module will soon provide optional default integration with Comments (which can be disabled).